Dual-response ratiometric fluorescence based ligand-functionalized CsPbBr3 perovskite quantum dots for sensitive detection of trace water in edible oils

Wang, Shuo; Yu, Long; Wei, Zhongyu; Xu, Qi; Zhou, Weiping; Xiao, Yuxiu

doi:10.1016/j.snb.2022.132010

Cited by 23 publications

(12 citation statements)

References 31 publications

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“…This is because of the intrinsic instability of CsPbI 3 , where the A-site cesium ion cannot keep lead iodide octahedral, while ligand loss can lead to a phase transformation to δ-CsPbI 3 . The morphology and lattice space (inset of Figure h) of new-formed black spheres are consistent with CsPbBr 3 quantum dots synthesized with the OctAm ligand in our previous study, which also indicates that OctAm is involved in the lattice reconstruction from I-JNPs here. Interestingly, bromide exchange in the undisturbed state achieves a larger wavelength shift and better FL intensity than in vibration (Figure S8), which is attributed to the reduction of local OctAm concentration near the perovskite surface, also suggests the dynamic lattice reconstruction during bromide exchange .…”

Section: Resultssupporting

confidence: 88%

Macrophage-Inspired Degradation-Activation System Enables Ultrasensitive Multicolor Detection of Haloacetic Acids via Janus Perovskite Halide Exchange

Wei

et al. 2023

Anal. Chem.

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Haloacetic acids (HAAs), as representative disinfection byproducts, have the potential hazards of teratogenesis, carcinogenesis, and mutagenesis. Herein, inspired by the scavenging physiology of macrophages and taking advantage of the unique properties of perovskites, we design a biomimetic integrated three-step workflow, named the macrophage-inspired degradation-activation system (MIDAS), for the detection of HAAs in aqueous samples. First, HAAs are “devoured” by methyl t-butyl ether (MTBE) from a sample. Then, ultraviolet C is utilized to induce the photolysis of MTBE and the dehalogenation of HAAs. Third, the photoinduced product, tertiary butyl haloalkane, can activate the vacancy defect-facilitated halide exchange of perovskites, generating multicolor fluorescent signals. The MIDAS realizes the rapid (<5 min), ultrasensitive (limit of detection: 30 and 15 ppb), and accurate (recovery: 95.2–109.4%) quantification of dichloroacetic acid and dibromoacetic acid in real water samples. Furthermore, a chemometrics-supported MIDAS portable platform is established for the visual semi-quantification of HAAs and the discrimination of binary mixed HAAs on site. The MIDAS-based strategy provides a highly efficient approach to trigger the perovskite halide exchange and shows the Midas touch-like ability in the fluorescent assay of HAAs in aqueous samples. To our knowledge, this is the first universal multicolor fluorimetry and the first application of perovskites for HAA detection.

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Section: Resultssupporting

confidence: 88%

Macrophage-Inspired Degradation-Activation System Enables Ultrasensitive Multicolor Detection of Haloacetic Acids via Janus Perovskite Halide Exchange

Wei

et al. 2023

Anal. Chem.

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“…Xiao's group modified dimethyl aminoterephthalate on the surface of CsPbBr 3 PQDs to prepare CsPbBr 3 @DMT-NH 2 QDs for the detection of water in oil. 242 The CsPbBr 3 @DMT-NH 2 QDs displayed weak blue emission at 445 nm from the DMT-NH 2 ligand and green strong emission at 530 nm from the QDs. After exposure to water, the green fluorescence of CsPbBr 3 was quenched due to the fact that water can disintegrate the QDs to their colorless precursors.…”

Section: Dual-emission Qds (D-qds)mentioning

confidence: 93%

“…Modifying the surface of QDs with organic molecules can generate a new emission from their surface, in addition to the original emission from the excitonic core. 238 The formed nanocomposite, which is called a quantum dot complex (QDC), can be employed for the ratiometric sensing of organic pollutants, 239 metal ions, 240 unsaturated fatty acids, 241 water in oil, 242 dopamine, 243 and phosphate. 244 For example, Chattopadhyay's group modified 8-hydroxyquinoline (HQ) on the surface of Mn 2+ -doped ZnS QDs for the ratiometric detection of unsaturated fatty acids in vegetable oils, 241 as shown in Fig.…”

Section: Dual-emission Qds (D-qds)mentioning

confidence: 99%

The construction of dual-emissive ratiometric fluorescent probes based on fluorescent nanoparticles for the detection of metal ions and small molecules

Li,

Lu,

2024

Analyst

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“…3,4 Additionally, water can accelerate the degradation and spoilage of oil-based food products, such as butter and edible oil. 5,6 Consequently it is imperative to develop straightforward and effective methods for determining the water content in different matrixes. The Karl Fischer titration method is a well-established technique commonly used for determination of the water content.…”

Section: ■ Introductionmentioning

confidence: 99%

Lead-Free Antimony-Based Perovskite Nanocrystals as a Fluorescent Nanoprobe for the Turn-On Detection of Trace Water in Organic Solvents

Wang,

Huang,

Gao

et al. 2024

ACS Appl. Nano Mater.

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This work reported the synthesis of lead-free antimony-based perovskite nanocrystals (Cs 3 Sb 2 Br 9 PNCs) through a ligand-assisted reprecipitation method. Cs 3 Sb 2 Br 9 PNCs exhibit strong blue emission with one maximum emission peak at 423 nm when excited at a wavelength of 375 nm. Notably, it was found that the presence of trace water significantly enhances the fluorescence of Cs 3 Sb 2 Br 9 PNCs. As the result, a fluorescence nanosensor was developed for the turn-on detection of trace water. The increase in the fluorescence intensity of Cs 3 Sb 2 Br 9 PNCs at 423 nm displays a good linear relationship with the water content in the range of 0.1−4.0% (v/v) with a detection limit of 0.033% (v/v). Measurement repeatability is confirmed through parallel measurements (n = 11) of a 2.0% (v/v) water content, resulting in a relative standard deviation of 2.1%. The efficacy of this nanosensor was successfully demonstrated for determining the water content in various commercial organic solvents, yielding satisfactory results.

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Dual-response ratiometric fluorescence based ligand-functionalized CsPbBr3 perovskite quantum dots for sensitive detection of trace water in edible oils

Cited by 23 publications

References 31 publications

Macrophage-Inspired Degradation-Activation System Enables Ultrasensitive Multicolor Detection of Haloacetic Acids via Janus Perovskite Halide Exchange

Macrophage-Inspired Degradation-Activation System Enables Ultrasensitive Multicolor Detection of Haloacetic Acids via Janus Perovskite Halide Exchange

The construction of dual-emissive ratiometric fluorescent probes based on fluorescent nanoparticles for the detection of metal ions and small molecules

Lead-Free Antimony-Based Perovskite Nanocrystals as a Fluorescent Nanoprobe for the Turn-On Detection of Trace Water in Organic Solvents

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